ISO (new JIS)
Old JISJIS B 1256(1963)Dimensions from the 1963 JIS. Some sizes differ from ISO in outside diameter and thickness, so use it when you have to match existing equipment or drawings. M1 to M52 are listed.ISO (new JIS)JIS B 1256(1978)Dimensions aligned with ISO. The values are from the 1978 edition and cover a wide range, M1 to M80. Some sizes differ from the current 2008 edition.Current JIS (2008)JIS B 1256(2008)Product grade A dimensions from the current JIS. Use these for new designs. The normal type is specified from M1.6 to M64 and the small type up to M36.
Plain washer, ISO (new JIS)
Notes
- This table holds the values of JIS B 1256:1978. The current edition is the 2008 one, in which the outside diameter of the normal type (M2.5, M3.5, M6, M8, M10), the outside diameter of the small type (M1.6, M2, M5, M6, M8, M12) and the inside diameter from M39 up have all changed. M1, M1.2, M1.4, M1.7, M2.2, M2.3, M2.6, M4.5 and sizes from M68 up are not specified in the current edition. Check the standard itself if you need the current values.
- References
- JIS B 1256(1978)
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